On 06/02/24 13:43, Mosbeck Martin via Jool-list wrote:
Hello everyone,
thanks for this great tool and the amazingly good documentation!
I have a question regarding node-based translation (as described in
https://nicmx.github.io/Jool/en/node-based-translation.html). I would
like to
use this for a router which has a public IPv6 LTE connection and clients
connected to it via a private IPv4 LAN. Both router and clients have
applications with hardcoded IPv4 addresses.
I’m wondering what to choose as the "proxy address for the private Jool's
traffic" (2001:db8:1::3 in the example). From first experiments - which
worked
nicely - I understand, this address is not really private, but used in
packets
sent via the Internet. From my LTE provider I get an IPv6 address with a /64
prefix. Can I just pick any address inside this /64 subnet without risking
address collisions with someone else? Can I be sure that any IPv6 LTE
provider
always offers me some range of addresses rather than only a single one?
Hi Martin,
You can rely on having a whole /64 assigned to you, this is mandated by
the 3GPP standards. You are free to use a secondary address within the
/64 as your the CLAT address.
The ModemManager documentation contains a very nice overview on how IPv6
(and IPv4) assignment happens in LTE networks, I suspect you might find
it interesting:
https://modemmanager.org/docs/modemmanager/ip-connectivity-setup-in-lte-modems/
Tore
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